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Volume 07
Advances in Crop Science and Technology
ISSN: 2329-8863
Agri 2019
August 15-16, 2019
August 15-16, 2019 | Rome, Italy
14
th
International Conference on
Agriculture & Horticulture
Noraziyah Abd Aziz Shamsudin, Adv Crop Sci Tech 2019, Volume 07
Development of rice for unfavorable ecosystems
Noraziyah Abd Aziz Shamsudin
Universiti Kebangsaan Malaysia, Malaysia
D
evelopment of rice cultivars which is tolerant to multiple abiotic tresses is essential to improve food security.
With the objective of improving grain yield (GY) under low water input (RS), three drought yield QTLs qDTY
2.2
,
qDTY
3.1
and qDTY
12.1
had successfully pyramided into Malaysian mega-variety rice, MR219 via marker assisted
QTLs pyramiding (MAQP) technique. Donor of the QTLs were the near isogenic lines developed by International
Rice Research Institute (IRRI). Three selected pyramided lines (PLs) were evaluated for their yield potential under RS
and non-stress (NS), and survivability under anaerobic germination, submergence and salinity stresses. Pyramided
lines produced higher yield compared to recipient parent, MR219 in all trials. PL-5 became the most promising PL
as it gave a yield advantages of 461.15 kg/ha and 1360.00 kg/ha under RS and NS conditions. Under submergence
stress, survival rate (SR) of all PLs and submergence tolerant check IR64-Sub1 was significantly different to MR219
(highly susceptible to submergence ) in two evaluation cycles (SS1 and SS2). Furthermore, non-significant result
was obtained for SR between PL-2 (80.00%) and IR64-Sub1 (86.67%) under anaerobic germination indicate that
these PLs especially PL-2 was capable to germinate and growing well under flooded condition. For salinity stress,
SR of PL-68 was higher than salinity tolerant check, Nona Bokra under intermediate (8 dS/m) and severe (15 dS/m)
salinity levels. Recovery score (RecS) of PL-68 was either same or higher than Nona Bokra for both salinity levels
in two evaluation cycles may indicate a high tolerance level of PL-68 under SL condition. This study suggests that
MAQP could be an effective strategy to enhance abiotic stresses tolerance in rice. Promising PLs used in this study
can be recommended for cultivation in either normal or unfavorable rice ecosystems in Malaysia as it may help in
stabilizing rice production and improving food security.
Recent Publications
1. Gwen Iris Descalsota-Empleo et al. (2019) Genetic dissection of grain nutritional traits and leaf blight resistance
in rice. Genes 2019,10,30: 1-23.
2. Arvind K, Nitika S, Shalabh D, Shailesh Y, BPM Swamy, & Noraziyah AAS (2018) Marker-assisted selection
strategy to pyramid two or more QTLs for quantitative trait-grain yield under drought. Rice 11:35.